-3m-m=-12

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Solution for -3m-m=-12 equation: 


Simplifying
-3m + -1m = -12

Combine like terms: -3m + -1m = -4m
-4m = -12

Solving
-4m = -12

Solving for variable 'm'.

Move all terms containing m to the left, all other terms to the right.

Divide each side by '-4'.
m = 3

Simplifying
m = 3

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